Threshing cylinder and concave teeth.



G.- G. GALLAN. I

THRESHING CYLINDER AND GONOAVE TEETH.-

APPLI'OATION FILED JULY 6,1911,

. Patented Feb. 4, 1913.

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APPLICATION FILED JULY 6,1911.

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CHARLES G. CALLAN, OF CHAMBERLAIN, SASKATCHEWAN, CANADA.

THRESI-IING CYLINDER AND CONCAVE TEETH.

Specification of (Letters Patent.

Patented Feb. 4, 1213.

Application filed July 6, 1911. Serial No. 637,233.

To all whom it may concern Be it known that I, CHARLES QALLAN, a subjectof the King of Great Britain, lBSICl: ing at Chamberlain, in theProvince of Saskatchewan, Dominion of Canada, have invented certain newand useful Improvements in Threshing Cylinder and Concave Teeth; and Ido hereby declare the following to be a full, clear, and exactdescriptlon of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to new and useful improvements in threshingcylinders and concaves and more especially to teeth therefor and theobject of my invention is to provide an improved means for forming andfastening the butt ends of the teeth in the cylinder and concave bars,to not only effectually support and hold the teeth rigidly 1n position,but to prevent the displacement of the teeth in the event of theirbecoming loosened.

A further object of my invention is to construct teeth so formed andtapered that when the thresher is to be used with dry grain the concaveneed only be dropped a very slight distance to prevent the kernels frombecoming broken, whereas with the teeth now in the market the concavemust be dropped to a considerable distance where by the tough heads passthrough without being thoroughly threshed. And a still further object ofmy invention is to provide a cylinder in which the cylinder teeth are soconstructed that the securing of the teeth to the cylinder bars alsoserves to secure the ring and cylinder bars to the cylinder head.

Vith these and other objects in view, my invention will be more fullydescribed, illustrated in the drawings which show a preferred embodimentof my device and then specifically pointed out in the claims which areattached to and form a part of this application.

In the accompanying drawings, Figure l is a side elevation of a part ofthe cylinder jsthowing three of the tooth bars in place.

1g. Fig. 3 is a side elevation of the cylinder head with the tooth barsremoved. Fig. 4 is the longitudinal section of the cylinder and concaveshowing the relation between the teeth. Fig. 5 is a front elevation ofone of the teeth. Fig. 6 is a side elevation thereof.

2 is a section on the line 2-2 of Fig. 1.,

Fig. 7 is a front elevation of a modified form of tooth. Fig. 8 is aside elevation of the same. Fig. 9 is an end elevation of the cylinderhead showing the recessed lugs by means of which the cylinder bars aresecured in place.

Referring more specifically to the drawings in which similar referencenumerals designate corresponding parts throughout, 1 designates one ofthe cylinder heads which as shown is provided with a plurality of spacedpart peripheral recesses 2 in which are seated the ends of the cylinderbars which I have here designated by the numerals 3,4 and 5. As will beseen by referring to the drawings these cylinder bars are all identicalin construction with the exception that the squared apertures formedtherein for the reception of the teeth are differently positioned ineach of the bars by which means the teeth are secured in staggered relation. For the purpose of illustration it is only necessary to showthree of all of the remaining bars are merely duplicates of the barsthus shown and positioned in the same order. Each of these bars is madeup of two parts, an inner bar member, an outer bar member, the innermember being somewhat thicker than the outer and each of these membersis provided with a plurality of spaced apart squared apertures 6, theapertures of the outer member being so positioned as to register withthe apertures of the inner members when said members are superimposed oneach other.

The cylinder head as best shown in Figs. 2 and 3 of the drawings isprovided adjacent each of its recesses with an inwardly directed luganda's these lugs vary accord ing to the particular cylinder bar whichis to be seated in the recess to which the lug corresponds l' havedenoted these lugs by the numerals 7, 8 and 9. Each of these lugs isprovided'with a squared aperture 6 adapted to register with theoutermost aperture of the cylinder bar which is to be secured theretoand in order to permit of this it is necessary that the lug 8 extendinwardly farther than the lug 7 and the lug 9 farther than the lug 8 aswill be readily understood by referring to the drawin s. Adjacent eachof the lugs 7 the cylin er head is provided with a recessed portion 11the purpose of which will be hereinafter fully explained. Each of thelugs is pro-V the bars as vided with a transversely extending bore 12the inner end of which is bisected longitudinally by one of the sides ofthe aperture in such a manner that a bolt threaded into the bore will beseated throughout its length therein but at the same time will partiallyextend into the aperture, the purpose of which construction will behereinafter explained.

Surrounding the cylinder head is the cus' t-omary cylinder ring or tire12 which rests upon the outer ends of each of the cylinder bars as shownand which is somewhat greater in width than the thickness of thecylinder head. This ring is provided with a plurality of spaced apartapertures 13, each of which is adapted to register with one of theapertures 6 of the bar 3, whereby the outermost tooth of each of saidbars is passed through the cylinder ring, cylinder bar 3 and lug 7. Theoutermost teeth of the bars 4: and 5 pass through the bars 1 and 5 andthrough the lugs 8 and 9 respectively and it will therefore be seen thatwhen these teeth are all secured in place the cylinder ring, bars andhead will all be secured together. As will be seen the outermost teethof the bars 6 are positioned so close to the cylinder head thatconsiderable difficulty will be experienced, under ordinarycircumstances, in applying the bolts which look these teeth in place. Toovercome this difficulty I have provided the heads with apertures 11, aspreviously described, which permit the application of a wrench to thesebolts.

Referring more specifically to Figs. 5 and 6 of the drawings my improvedteeth will be seen to consist each of a stock portion 14: of thecustomary shape, with the exception that front and rear edge portionsare beveled as at 15 while the side faces of the teeth converge towardeach other to form a wedge shaped end portion 16 the purpose of saidshaping to be more fully described hereafter. These stock portionsterminate at their other end in a squared butt 17 which as shown isslightly tapered to correspond to a slight tapering of the sockets ofthe tooth bars and lugs of the cylinder head whereby when the butts ofthe teeth are driven home in said aperture they will closely engage thesame. The side faces of each of the butts 17 are provided withtriangular shaped recesses 18, said recesses extending at their upperend almost the entire distance across the tooth while the lower side ofsaid recesses extend diagonally toward the end of the butt as shown at19.

In Figs. 7 and 8 I have shown a slightly modified form of tooth which inplace of the recesses 18 is provided upon each side with a pair oftransverse recesses 20, said recesses being elongated and rounded at theends and of less length at one end than at the other so that the lowerside of the recess is inclined as at 21. Either form of tooth may beemployed as preferred.

In assembling the cylinder the cylinder bars are put in place and thecylinder rings positioned upon the cylinder heads thus serving totemporarily hold the bars in p0- sition, all of the teeth of thecylinder bar save those on each end having been previously driven intothe sockets formed by the apertures 6 and secured in place by threadedbolts 22 which are passed through transversely extending threaded bores23 formed in the lower member of the cylinder bar and bisecting theapertures therein in the same manner as do the bores 12 in the lugs onthe cylinder head. \Vhen the cylinder bars have thus been positioned theremaining teeth are driven into position and secured by means of boltspassed into the bores 12 and engaging with the recesses in the sidefaces of the teeth. The teeth which are secured to the cylinder bars areheld in place by the engagement between the end of the bolt and theouter portion of the recesses 18 or by the outer recesses 20 accordingto which form of tooth is used. The teeth which are secured by bolt-spassing through the lugs are secured in place by the engagement betweenthe ends of the bolts and the inner end of the recesses 18 or the innerrecesses 20 according to the form of teeth used. These bolts 22 arepreferably provided with set nuts 24 to prevent the bolts from workingloose.

In Fig. 1 I have illustrated a cylinder and concave in working positionshowing the manner in which the teeth of the cylinder and the teeth ofthe concave are positioned with respect to each other when in operation,and it will be seen that by converging the side faces of the teeth toform wedge shaped end portions the concave need be dropped but a slightdistance to prevent dry kernels from being chopped and the space thusleft is so slight that the grain is thoroughly threshed and it isimpossible for a head of grain to pass through. It will also be seenthat because of the peculiar construction of the cylinder head andbecause of the peculiar fastening means employed in securing the teeththerein the securing of the teeth secures the cylinder rings andcylinder bars firmly to the cylinder head.

What I claim is 1. A cylinder for threshing machines, comprisingcylinder heads having spaced apart radially extending recesses formed intheir peripheral edges, double cylinder bars adapted to be positionedwith their ends in said recesses, cylinder rings surrounding said headand resting upon the ends of said bars, teeth for said bars, and meansfor securing said teeth in place, said means also serving to secure thebars and rings to the cylinder heads.

2. A cylinder for threshing machines, comprising cylinder heads havingspaced apart radially extending recesses formed in their peripheraledges, lugs formed integrally with said heads and adjacent saidrecesses, said lugs extending inwardly and being provided with squaredapertures forming sockets, double cylinder bars adapted to be positionedwith their ends in said recesses, said bars being provided with squaredapertures adapted to register with the sockets in said lugs, cylinderrings surrounding said heads and resting upon the ends of said bars,said rings being provided with apertures adapted to register with aportion of the apertures of said bars, teeth for said bars, said teethhaving butt portions adapted to be passed through the apertures in therings and bars and into the sockets of the lugs, and means co-actingwith said lugs for securing the teeth in position.

3. The combination with a cylinder for threshing machines, comprisingcylinder heads having spaced apart recesses formed in their peripheraledges and lugs formed integrally with said heads and provided withsquared apertures forming sockets, said lugs also being provided withtransversely extending threaded bores communicating with the inner sidesof said sockets throughout their length, cylinder bars adapted to bepositioned with their ends in said recesses and having squared aperturesadapted to register with the apertures of said lugs, cylinder ringssurrounding said heads and resting upon the ends of the bars, said ringsbeing provided with squared apertures registering with the apertures ofthe bars, of teeth for said cylinder, said teeth having butt portionsadapted to be passed through the apertures of the rings and bars andinto the sockets of the lugs, the side faces of said teeth beingprovided with cam faced recesses adapted to be engaged by bolts passedthrough the bores of said lugs whereby the teeth upon one end of saidbars may be readily interchanged with the teeth upon the other end.

In testimony whereof, I affix my signature in presence of two witnesses.

CHARLES G. GALLAN.

WVitnesses:

G. F. BLAIR, WV. H. GUNDRY.

Copies of this patent may be obtained for five cents each, by addressingthe f Commissioner of Patents,

Washington, D. G.

